16384 (1981 ES31) is a mid-sized asteroid that orbits between Mars and Jupiter in the outer reaches of the main asteroid belt. NASA JPL has not classified 1981 ES31 as potentially hazardous because its orbit does not bring it close to Earth.
1981 ES31 orbits the sun every 2,110 days (5.78 years), coming as close as 3.16 AU and reaching as far as 3.28 AU from the sun. 1981 ES31 is about 9.0 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the San Francisco Bay.
The rotation of 1981 ES31 has been observed. It completes a rotation on its axis every 43.77 hours.
1981 ES31's orbit is 2.15 AU from Earth's orbit at its closest point. This means that there is an extremely wide berth between this asteroid and Earth at all times.
Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth.
1981 ES31's orbit is determined by observations dating back to Feb. 9, 1981. It was last officially observed on June 26, 2023. The IAU Minor Planet Center records 1,643 observations used to determine its orbit.
The position of 16384 (1981 ES31) is indicated by a ◯ pink circle. Note that the object may not be in your current field of view. Use the controls below to adjust position, location, and time.